ARLINGTON, Va. -- The muscular U.S. Navy diver hoisted a 60-pound life-support regulator onto his back, then donned a 30-pound metal helmet. Fellow divers connected his diving suit to an "umbilical" ...

The US Navy has begun pool testing of its new MK29 Mixed Gas Rebreather designed to conserve helium during deep sea dives below 170 ft (52 m). The test dives took place at the Naval Surface Warfare ...

The Haenyeo women who dive deep into the East China Sea to harvest sea urchins and shellfish spend the most time underwater of any humans ever studied — one to five hours a day, researchers report ...

A couple of years ago, Melissa Ilardo found herself aboard a motorboat traversing the ocean around Jeju Island, which sits some 50 or 60 miles off the coast of South Korea. Before the vessel had even ...

Rebreathers could make an ocean explorer’s ultimate fantasies come true. Recirculating the same air again and again might sound like science fiction, but compared against traditional scuba equipment, ...